139 lines
4.5 KiB
C
139 lines
4.5 KiB
C
/* $NetBSD: tpm_isa.c,v 1.8 2021/01/16 00:43:03 thorpej Exp $ */
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/*
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* Copyright (c) 2019 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Maxime Villard.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 2008, 2009 Michael Shalayeff
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* Copyright (c) 2009, 2010 Hans-Joerg Hoexer
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* All rights reserved.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER IN
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* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: tpm_isa.c,v 1.8 2021/01/16 00:43:03 thorpej Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/bus.h>
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#include <sys/pmf.h>
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#include <dev/ic/tpmreg.h>
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#include <dev/ic/tpmvar.h>
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#include <dev/isa/isareg.h>
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#include <dev/isa/isavar.h>
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#include "ioconf.h"
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static int tpm_isa_match(device_t, cfdata_t, void *);
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static void tpm_isa_attach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(tpm_isa, sizeof(struct tpm_softc), tpm_isa_match,
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tpm_isa_attach, NULL, NULL);
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static int
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tpm_isa_match(device_t parent, cfdata_t match, void *aux)
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{
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struct isa_attach_args *ia = aux;
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bus_space_tag_t bt = ia->ia_memt;
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bus_space_handle_t bh;
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int rv;
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/* There can be only one. */
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if (tpm_cd.cd_devs && tpm_cd.cd_devs[0])
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return 0;
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if (ia->ia_iomem[0].ir_addr == ISA_UNKNOWN_IOMEM)
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return 0;
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/* XXX: integer locator sign extension */
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if (bus_space_map(bt, (unsigned int)ia->ia_iomem[0].ir_addr,
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TPM_SPACE_SIZE, 0, &bh))
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return 0;
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if ((rv = (*tpm_intf_tis12.probe)(bt, bh)) == 0) {
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ia->ia_nio = 0;
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ia->ia_io[0].ir_size = 0;
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ia->ia_iomem[0].ir_size = TPM_SPACE_SIZE;
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}
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ia->ia_ndrq = 0;
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bus_space_unmap(bt, bh, TPM_SPACE_SIZE);
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return (rv == 0) ? 1 : 0;
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}
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static void
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tpm_isa_attach(device_t parent, device_t self, void *aux)
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{
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struct tpm_softc *sc = device_private(self);
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struct isa_attach_args *ia = aux;
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bus_addr_t base;
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bus_size_t size;
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int rv;
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base = (unsigned int)ia->ia_iomem[0].ir_addr;
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size = TPM_SPACE_SIZE;
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aprint_normal("\n");
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aprint_naive("\n");
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sc->sc_dev = self;
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sc->sc_ver = TPM_1_2;
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mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE);
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sc->sc_busy = false;
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sc->sc_intf = &tpm_intf_tis12;
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sc->sc_bt = ia->ia_memt;
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if (bus_space_map(sc->sc_bt, base, size, 0, &sc->sc_bh)) {
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aprint_error_dev(sc->sc_dev, "cannot map registers\n");
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return;
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}
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if ((rv = (*sc->sc_intf->init)(sc)) != 0) {
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aprint_error_dev(sc->sc_dev, "cannot init device, rv=%d\n", rv);
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bus_space_unmap(sc->sc_bt, sc->sc_bh, size);
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return;
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}
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if (!pmf_device_register(self, tpm_suspend, tpm_resume))
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aprint_error_dev(self, "couldn't establish power handler\n");
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}
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